Chapter 33

Question 1

Tooth decay

Answer 1

The localized destruction of dental hard tissues via organic acids

Question 2

Caries

Answer 2

Appear as radiolucent areas on the radiograph.

Question 3

40-50% loss of calcium and phosphorus

Answer 3

required before caries is visible on a radiograph. Caries are almost always deeper than visible on the radiograph

Question 4

C1

Answer 4

Incipient

Question 5

What does C1 of the Caries depth grading system signify

Answer 5

Enamel caries less then 1/2 way through the enamel

Question 6

C2

Answer 6

Moderate

Question 7

What does C2 of the Caries depth grading system signify

Answer 7

more than 1/2 way through enamel but not to the DEJ

Question 8

C3

Answer 8

Advanced

Question 9

What does C3 of the Caries depth grading system signify

Answer 9

Caries of enamel and dentin at or through the DEJ into the dentin but less than 1/2 way to the pulp

Question 10

C4

Answer 10

Severe

Question 11

What does C4 of the Caries depth grading system signify

Answer 11

Penetrates more than 1/2 to the pulp

Question 12

What are the classification of caries

Answer 12

Proximal or interproximal 
Occlusal
Buccal and lingual
Cemental (root)
Recurrent 
Rampant
Arrested

Question 13

Proximal or interproximal caries

Answer 13

Between the teeth usually at or just below the contact

Question 14

Proximal caries on radiographs

Answer 14

A radiolucent notch triangular with point toward the DEJ

Question 15

Occlusal caries

Answer 15

Caries on the chewing surface of the teeth. Incipient and moderate are not usually seen radiographically

Question 16

Occlusal caries on radiograph

Answer 16

Appear as radiolucent just below the enamel and above the pulp

Question 17

Buccal and lingual caries

Answer 17

Best detected clinically. Difficult to see radiographically and almost impossible to tell if buccal or lingual

Question 18

Cemental (root) caries

Answer 18

Develop between the enamel border and the gingiva. Bone loss and recession are necessary. Sometimes difficult to tell the difference between cervical burnout and caries

Question 19

Reccurent decay

Answer 19

Secendary caries or caries under or around a restoration

Question 20

Rampant caries

Answer 20

Severe, unchecked caries affecting multiple teeth

Question 21

Arrested caries

Answer 21

Caries that are no longer active. Most often seen when the adjacent tooth is extracted and the tooth can now be brushed better

Question 22

What can be mistaken for caries

Answer 22

Composites
Temporary crowns and porcelain jackets
Cervical burnout
Mach band effect

Question 23

Cervical burnout

Answer 23

Optical illusion caught on the radiograph caused by a concavity on the root that shows a RL void
Often appears as fuzzy outline
Always more apical than inter proximal caries
Look for bone loss

Question 24

Mach band effect

Answer 24

An optical illusion caused when the teeth overlap on the radiograph and this causes a dense radiopacity surrounded by RL lines